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Gef medium Sized Project Grant Proposal sustainable land management in the zambian miombo woodland ecosystem


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Appendix 2. Agro-ecological Regions of Zambia


Appendix 3. The Project Area




Appendix 4. Carbon Sequestration as a Result of a Shift to Conservation Farming










































































Chitemene System (the cells in the spreadsheet indicate the biomass present on the plot (expressed as tonnes C);

bold cells indicate the farmed plots)




























Assumptions:








































Carbon storage on pristine Miombo woodland is 20 tonnes/ha.































Farmers cut half of the vegetation on a total of 6 ha to burn on 1 ha plot to be cultivated; they can cultivate this plot during 5 years.










The yearly regrowth is 0.5 tonne C/year, regrowth takes place in 20 years.















































































year ->





































Plot (1 ha)

0

1

6

11

16

21

22

23

24

25

26

31







1

20

0

0

2.5

5

0

0

0

0

0

0

2.5







2

20

10

12.5

15

17.5

10

10.5

11

11.5

12

12.5

15







3

20

10

12.5

15

17.5

10

10.5

11

11.5

12

12.5

15







4

20

10

12.5

15

17.5

10

10.5

11

11.5

12

12.5

15







5

20

10

12.5

15

17.5

10

10.5

11

11.5

12

12.5

15







6

20

10

12.5

15

17.5

10

10.5

11

11.5

12

12.5

15







7

20

10

12.5

15

17.5

10

10.5

11

11.5

12

12.5

15







8

20

20

0

0

2.5

5

5.5

6

6.5

7

0

0







9

20

20

10

12.5

15

17.5

18

18.5

19

19.5

10

12.5







10

20

20

10

12.5

15

17.5

18

18.5

19

19.5

10

12.5







11

20

20

10

12.5

15

17.5

18

18.5

19

19.5

10

12.5







12

20

20

10

12.5

15

17.5

18

18.5

19

19.5

10

12.5







13

20

20

10

12.5

15

17.5

18

18.5

19

19.5

10

12.5







14

20

20

10

12.5

15

17.5

18

18.5

19

19.5

10

12.5







15

20

20

20

0

0

2.5

3

3.5

4

4.5

5

0







16

20

20

20

10

12.5

15

15.5

16

16.5

17

17.5

10







17

20

20

20

10

12.5

15

15.5

16

16.5

17

17.5

10







18

20

20

20

10

12.5

15

15.5

16

16.5

17

17.5

10







19

20

20

20

10

12.5

15

15.5

16

16.5

17

17.5

10







20

20

20

20

10

12.5

15

15.5

16

16.5

17

17.5

10







21

20

20

20

10

12.5

15

15.5

16

16.5

17

17.5

10







22

20

20

20

20

0

2.5

3

3.5

4

4.5

5

7.5







23

20

20

20

20

10

12.5

13

13.5

14

14.5

15

17.5







24

20

20

20

20

10

12.5

13

13.5

14

14.5

15

17.5







25

20

20

20

20

10

12.5

13

13.5

14

14.5

15

17.5







26

20

20

20

20

10

12.5

13

13.5

14

14.5

15

17.5







27

20

20

20

20

10

12.5

13

13.5

14

14.5

15

17.5







28

20

20

20

20

10

12.5

13

13.5

14

14.5

15

17.5







Total Carbon

560

480

415

367.5

337.5

340

353.5

367

380.5

394

340

340




















































Conclusions:











































After 20 years, a (dynamic) equilibrium is reached in which the release of carbon, once in 5 years, equals the sequestration of carbon in the following 5 years. When the equilibrium is reached, total carbon storage on a 28 ha plot varies from 340 (in the year following the burning of a new plot) to 394 tonnes carbon (in the year proceeding the burning of a new plot), see also Figure 1 below.






When the equilibrium is reached after 20 years:







5-years average carbon content on 28 ha:

367

tonnes
























Average per ha carbon content : 13.1 tonnes









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